Raspberrypi4-64, usb no power #446
Comments
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What power supply are you using? Are you testing it with an official charger? |
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Official power source for rpi4. |
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That is worrying. Would you be able to give it a try with an older firmware and test that theory? |
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Using 8d5fc54 i can attach my Razer Blackwidw Lite keyboard and type. |
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The relevant kernel issue is: raspberrypi/linux#3093 |
The PCI controller on the Raspberry Pi 4 acts as a DMA controller and can only address the first 3Gb[1] of the memory space. On 32bit this was addressed by implementing bouncing buffers[2] but this currently has no support for arm64. In order to have working USB, as a workaround, we limit the ram to 3G. Fixes #446 [1] raspberrypi/linux#3093 [2] https://github.com/raspberrypi/linux/blob/rpi-4.19.y/drivers/pci/controller/pcie-brcmstb-bounce.c Signed-off-by: Andrei Gherzan <andrei@gherzan.ro>
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@iohe if you are willing to compromise on 1Gb of ram, here is a PR ^ |
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ok for now, will revisit later for full 4g. |
The PCI controller on the Raspberry Pi 4 acts as a DMA controller and can only address the first 3Gb[1] of the memory space. On 32bit this was addressed by implementing bouncing buffers[2] but this currently has no support for arm64. In order to have working USB, as a workaround, we limit the ram to 3G. Fixes #446 [1] raspberrypi/linux#3093 [2] https://github.com/raspberrypi/linux/blob/rpi-4.19.y/drivers/pci/controller/pcie-brcmstb-bounce.c Signed-off-by: Andrei Gherzan <andrei@gherzan.ro>
The PCI controller on the Raspberry Pi 4 acts as a DMA controller and can only address the first 3Gb[1] of the memory space. On 32bit this was addressed by implementing bouncing buffers[2] but this currently has no support for arm64. In order to have working USB, as a workaround, we limit the ram to 3G. Fixes #446 [1] raspberrypi/linux#3093 [2] https://github.com/raspberrypi/linux/blob/rpi-4.19.y/drivers/pci/controller/pcie-brcmstb-bounce.c Signed-off-by: Andrei Gherzan <andrei@gherzan.ro>
The PCI controller on the Raspberry Pi 4 acts as a DMA controller and can only address the first 3Gb[1] of the memory space. On 32bit this was addressed by implementing bouncing buffers[2] but this currently has no support for arm64. In order to have working USB, as a workaround, we limit the ram to 3G. Fixes #446 [1] raspberrypi/linux#3093 [2] https://github.com/raspberrypi/linux/blob/rpi-4.19.y/drivers/pci/controller/pcie-brcmstb-bounce.c Signed-off-by: Andrei Gherzan <andrei@gherzan.ro>
Description
Keyboard is not powered, kernel reports errors
Steps to reproduce the issue:
Describe the results you received:
Errors encountered in kernel :
[ 2.530074] usb 1-1: new high-speed USB device number 4 using xhci_hcd
[ 2.550489] usb 1-1: device descriptor read/8, error -61
[ 2.678539] usb 1-1: device descriptor read/8, error -61
[ 2.914059] usb 1-1: new high-speed USB device number 5 using xhci_hcd
[ 2.934469] usb 1-1: device descriptor read/8, error -61
[ 3.062515] usb 1-1: device descriptor read/8, error -61
[ 3.170269] usb usb1-port1: unable to enumerate USB device
Describe the results you expected:
Usb keyboard to work.
Additional information you deem important (e.g. issue happens only occasionally):
Always happens.
It did not happen with meta-raspberry@ 1e329d3
Additional details (revisions used, host distro, etc.):
layers used:
-poky@97c5921666
-meta-openembedded@27d1d3dfa
local.conf has:
MACHINE ?= "raspberrypi4-64"
DISTRO_FEATURES_append = " opengl"
DISTRO_FEATURES_append = " polkit"
u-boot is not enabled or used.
-Image : core-image-x11
Other packages in image: xfce4
dmesg.txt
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